Tire attachment



PATENT OFFICE.

JOHN W. MCKENZIE, 0F BAY CITY. MICHIGAN.

TIRE ATTACHMENT.

Application filed January 30. 1918.

To all HILU/IL it may rmccr/i Be it known, that l, JHHN W. McKuxzil-i, a citizen of the United States of America, residing at Bay ity. in the county of Bay amt State, ol AIichigan. have invented certain new aml useful Improvements in Tire Attaclmients, of which the following is a specification.

The invention relates to a non-skid attachment for automobile trucks amt the like.

An object of the present invention is to improve the construction of non-skid de vices and to provide a simple, practical and etlieicnt anti-skidding device designed particularlv for use. on heavy automobile. trucks and the like equipped with spaced twin tires and having an intervening groove between the same.

A further object of the invention is to provide an anti skidding tire attachment of this character adapted to extend across the faces of the spaced tires and provided with attaching means located in the intermediate groove between the tires so as to be protected b v the same.

It is also an object of the invention to pr0- vide an anti-skidding tire attachment; having spaced transverse members capable of a limited pivotal movement to enable the same to'slip on the tire and thereby pass obstructions without injury to the device. V

\Vith the above aml other objects in view, the present invention consists in the combination and arrangement ot parts herein after more fully described, illustrated in the accon'ipanying drawings. and particularly pointed out. in the appended claims, it being understood that changes maybe made in the form, size. proportion aml minor details without departing from the spirit or sacrificing an) oi the advantages of the invention.

In the drawings:

Figure 1 is an edge view of an automobile truck wheel provided with an anti-skidding tire attaclnnent constructed in accordance with this invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is an enlarged detail side View of one of the friction gripping members.

Figs 4 is an enlarged detail plan view of a ort'ion of the device showing two of the friction-gripping members and a section of the connecting chain.

Fig. 5 is an enlarged detail sectional view Specification of Letters Patent.

' atentcdthdy1,1919.

Serial 110.214. 196.

illust rat ing the fastening means for securing the device to the rim of a wheel.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention. 1 designates a double tired wheel of an ordinary heavy automobile truck having spokes 2 set in a hub 3. but the wheel may be" t' any other desired construction as will .be. readily understood. The rim 4 of the wheel is equipped with a pair of tires 5 arranged in spaced relation to provide an intervening groove in which is arranged a fastening means for securing the automobile ant i skidding device to the rim of the wheel.

The anti-skidding tire attaclnnent comprises in its construction transversely disposed friction members (1 con tructed oi suitable material and extending across the spaced tires and spanning the intervening space between the same and having their terminal portions t3" curved slightly at the outer side edges of the tires The friction gripping members are provided with rear trall v arranged loops 7 preterabtv formed by coiling the material of which the said memb rsare constructed and extending inwardl)- from the said members and located within the intervening groove between the spaced tires. The loops 7 are preferably of a diameter less than the thickness of the tires and terminate short of the outer face of the rim as clearl shown in Fig. 5 of the drawing and the said friction gripping members are connected and maintained in spaced relation b v a chain 8 located in the intervening groove between the tires and composed of links which are linked into the loops or rings of the friction gripping members. This provides a pivotal or swivel connection between the transverse gripping members and the chain and permits a limited pivotal movement of the gripping members. as illustrated in dotted lines in Fig. lof the drawing to permit the said gripping members to slip and pass obstructions without. injury, especially when a truck or other motor vehicle equipped with the anti-skidding device is driven close to the curbing ota street. Various other forms of flexible connections may of course be employed and the chain is secured to the rim by a double hookbolt 9 piercing the rim and having a pair of oppositely extending wings or engaging arms whiclnextend through the adjacent links of the chain and connect ho same and secure the chain to the rim of the Wheel. as clearly shown in Fig. 5 of the drawing. The belt is equipped with a nut ll. located at the inner 'laee ot the rim and the hills of the wings or hooks are received within recesses or salts 12 formed in the outer face of the rim and permitting the said hills to extend below the said outer face whereby the links of the chain are serurely confined in the arms or \\'illgs of the double hook bolt. This construction will permit the anti-skidding tire attachment to he quickly applied to and readily removed from a wheel. If desired, any number of the above, or additional fastening means may be employed. This will enable the chain to be attached at ditl'erent points around the rim of the wheel as required. In applying the anti-skidding tire attachment to a. Wheel the double hook holt may he arranged in the opening 13 of the rim in a sullieiently loose condition to cnahle the wings to he withdrawn from the recesses: or seats 12 and after the chain and the transverse gripping memhers have been placed around the wheel the terminal links of the chain may he engaged with the wings of the douhle hook holt. and the latter may be tightened to draw the wings into the necesses or seats 12. This will securely fasten the anti-skidding device on the Wheel.

It will be seen that the anti-skidding de' rice is exceedingly simple, economical. and a durable attachment for douhle tire wheels for heavy trucks and analogous vehicles and that they can be easily and cheaply mannfactured and quickly applied toand removed from the rim of a wheel.

It will also be apparent: that the friction gripping nu-uihers. owing to their limited pivotal movement on the rim. are not liabl to he hroken and that in llle cram of injury they may he quirkly replaced to repair lllt' device.

\Vlrat is rlaiined is:

1. An anti-skidding tll't' attachnu-nt. wont prising a securing memher adapted to he la tened to a tire. and a transversely extending: gripping memher pivotally mounted on the securing memher and adapted to he held thereby across the tread ot' the tire for a limited pivotal movement about a radial axis.

\n anti-skidding tire attachment, coniprising a securing memher adapted to he tastened to a tire and including cirelnntereir tially extending links. and gripping: members adapted to lie against the tread ol' the tire and haring inwardly extending transverse loops engaging said links of the securing meinher and adapted for a limited longitu dinal l'norement thereon to permit lhe grip ping memhers heing' deflected hy olistrlu tions in the roadway.

3. An anti-skidding tire athu-hnu-nt. comprising a securing mcniher adapted to he tae tened to a. tire and including cirruml'ereir tially extending links. and gripping members adapted to lie against the tread of the tire and having inwardly extending transrerse loops engaging said links of the scour ing Inemlier to admit the. pivoting and a limited longitlulinal sliding movement ot the gripping memhers on the. links when tll" fiected by ohstrnctions in the roadway.

In testimony whereof I alliX my signature.

JOHN W. MQKENZIF. 

